Br. Johnny Varghese, Mumbai, gives four sermons about the History and Chronology of the Bible. The Biblical chronology gives 4000 BC for the start of the human race. This conflicts with secular chronology, which is based on evolution theory and radiometric dating. However, radiometric dating is fraught with assumptions and therefore does not discredit the Biblical timeframe. Listening to these sermons can clear your doubts and also show that the Bible is 100% sure.